JP3924237B2 - Plastic injection molded product and its strength measurement method - Google Patents
Plastic injection molded product and its strength measurement method Download PDFInfo
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- JP3924237B2 JP3924237B2 JP2002310162A JP2002310162A JP3924237B2 JP 3924237 B2 JP3924237 B2 JP 3924237B2 JP 2002310162 A JP2002310162 A JP 2002310162A JP 2002310162 A JP2002310162 A JP 2002310162A JP 3924237 B2 JP3924237 B2 JP 3924237B2
- Authority
- JP
- Japan
- Prior art keywords
- plastic injection
- molded product
- strength
- injection molded
- measuring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Description
【０００１】
【発明の属する技術分野】
本発明は、プラスチック射出成形品及びその強度測定方法に関するものである。
【０００２】
【従来の技術】
プラスチック材料を乾燥不十分のまま射出成形すると、加水分解を起こし著しく強度が低下することがある。強度低下の判断は目視で行うことはできない。したがって、成形品に負荷をかけて破壊しその判断を行うことが多かった。
【０００３】
【発明が解決しようとする課題】
しかし、成形品に負荷をかけて破壊し強度低下の判断を行う場合、成形品を損なったり、作業者の感覚に頼るところが大きいために正確な強度低下の判断は難しいという問題があった。
【０００４】
そこで本発明は、成形品を損なうことなく、強度低下の判断を正確に行うプラスチック射出成形品と、その強度測定方法とを提供することを目的としている。
【０００５】
【課題を解決するための手段】
上記目的を達成するために、請求項１記載の発明は、ランナー部に凸形状部を有し、かつ、前記凸形状部の基部にノッチ形状部が形成されていることを特徴とする。
【０００６】
また、本発明のプラスチック射出成形品の強度測定方法は、請求項２に記載の通り、請求項１に記載のプラスチック射出成形品の強度測定方法であって、射出成形後、前記ランナー部に設けた前記凸形状部の先端ないし先端付近に、強度測定器のフックを引っ掛けて、前記凸形状部が破断するまで引っ張り続けて測定することを特徴とする。
【０００７】
【発明の実施の形態】
以下、図面により本発明の実施の形態を詳細に説明する。図１はプラスチック射出成形品の参考構成図であり、（ａ）は正面図、（ｂ）は側面図である。本発明のプラスチック射出成形品は、プラスチックの射出成形工程において生じるランナー部１に、ある一定の高さを持つリブ状の凸形状部２を設けてある。
【０００８】
図２は他のプラスチック射出成形品の参考正面図である。この形態では、凸形状部２の先端に鉤形状部３を形成し、プラスチック射出成形品の強度測定時に、測定器が鉤形状部３に引っ掛かるようにしている。
【０００９】
図３は他の例に係るプラスチック射出成形品の正面図である。この形態では、凸形状部２の先端近傍にくぼみ形状部４を形成し、プラスチック射出成形品の強度測定時に、測定器がくぼみ形状部４に引っ掛かるようにしている。
【００１０】
図４は本発明の実施の形態に係るプラスチック射出成形品の正面図である。この実施の形態では、凸形状部２の基部にノッチ形状部５を形成し、プラスチック射出成形品の強度測定時に、その感度を高めるようにしている。
【００１１】
図５は本発明に係るプラスチック射出成形品の強度測定方法の実施の様子を示す要部斜視図である。射出成形後、ランナー部１に設けた凸形状部２の先端部に測定器のフックを引っ掛けて、凸形状部２が破断するまで引っ張りつづけ、破断したらその時の値を読み取る。この場合、測定器としてピーク値が残るプッシュプルゲージ６を使うのが望ましい。
【００１２】
【発明の効果】
以上説明したように、請求項１記載の発明によれば、ランナー部に設けた凸形状部のくぼみ形状部に測定器のフックを引っ掛けて強度測定するため、破断強度を数値化でき、プラスチック射出成形品を損なうことなく、正確に強度評価を行うことができ、かつ、凸形状部の基部にノッチ形状部を形成したので、強度測定時の感度を高めることができる。
【００１３】
請求項２記載の発明によれば、ランナー部に設けた凸形状部のくぼみ形状部に測定器のフックを引っ掛けて強度測定するため、破断強度を数値化でき、プラスチック射出成形品を損なうことなく、正確に強度評価を行うことができる。
【図面の簡単な説明】
【図１】プラスチック射出成形品（参考例）の構成図であり、（ａ）は正面図、（ｂ）は側面図である。
【図２】他のプラスチック射出成形品（参考例）の正面図である。
【図３】他のプラスチック射出成形品（参考例）の正面図である。
【図４】本発明の実施の形態に係るプラスチック射出成形品の正面図である。
【図５】本発明に係るプラスチック射出成形品の強度測定方法の実施の様子を示す要部斜視図である。
【符号の説明】
１ ランナー部
２ 凸形状部
３ 鉤形状部
４ くぼみ形状部
５ ノッチ形状部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a plastic injection molded article and a strength measuring method thereof .
[0002]
[Prior art]
If the plastic material is injection-molded with insufficient drying, hydrolysis may occur and the strength may be significantly reduced. The judgment of strength reduction cannot be made visually. Therefore, it is often the case that a judgment is made by damaging the molded product under load.
[0003]
[Problems to be solved by the invention]
However, when a load is applied to a molded article to determine whether the strength is reduced, there is a problem that it is difficult to accurately determine the strength reduction because the molded article is damaged or the operator's sense is largely relied upon.
[0004]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a plastic injection molded product that accurately determines the strength reduction without impairing the molded product, and a method for measuring the strength thereof.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to
[0006]
In addition, the method for measuring the strength of a plastic injection molded product according to the present invention is the method for measuring the strength of a plastic injection molded product according to
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a reference configuration diagram of a plastic injection molded product, in which (a) is a front view and (b) is a side view. In the plastic injection-molded product of the present invention, a rib-
[0008]
FIG. 2 is a reference front view of another plastic injection molded product. In this embodiment, the hook-
[0009]
FIG. 3 is a front view of a plastic injection molded product according to another example . In this embodiment, the concave portion 4 is formed in the vicinity of the tip of the
[0010]
FIG. 4 is a front view of a plastic injection molded product according to the embodiment of the present invention. In this embodiment, the notch-
[0011]
FIG. 5 is a perspective view of a principal part showing a state of implementation of the strength measurement method for a plastic injection molded product according to the present invention. After the injection molding, the hook of the measuring device is hooked on the tip of the
[0012]
【The invention's effect】
As described above, according to the first aspect of the present invention, since the strength is measured by hooking the hook of the measuring device to the concave portion of the convex portion provided in the runner portion, the breaking strength can be quantified, and the plastic injection The strength can be accurately evaluated without damaging the molded product, and since the notch-shaped portion is formed at the base of the convex-shaped portion, the sensitivity at the time of measuring the strength can be increased.
[0013]
According to the second aspect of the present invention, the strength of the measuring instrument is hooked on the concave portion of the convex portion provided in the runner portion, and the strength is measured. The strength can be accurately evaluated.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a plastic injection molded product (reference example), (a) is a front view, and (b) is a side view.
FIG. 2 is a front view of another plastic injection molded product (reference example).
FIG. 3 is a front view of another plastic injection molded product (reference example) .
FIG. 4 is a front view of a plastic injection molded product according to the embodiment of the present invention.
FIG. 5 is a perspective view showing a main part of a method for measuring the strength of a plastic injection molded product according to the present invention.
[Explanation of symbols]
DESCRIPTION OF
Claims (2)
射出成形後、前記ランナー部に設けた前記凸形状部の先端ないし先端付近に、強度測定器のフックを引っ掛けて、前記凸形状部が破断するまで引っ張り続けて測定することを特徴とするプラスチック射出成形品の強度測定方法。After injection molding, the plastic injection is characterized in that a hook of a strength measuring device is hooked on or near the tip of the convex portion provided in the runner portion, and measurement is continued until the convex portion is broken. Strength measurement method for molded products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002310162A JP3924237B2 (en) | 2002-10-24 | 2002-10-24 | Plastic injection molded product and its strength measurement method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002310162A JP3924237B2 (en) | 2002-10-24 | 2002-10-24 | Plastic injection molded product and its strength measurement method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004142263A JP2004142263A (en) | 2004-05-20 |
| JP3924237B2 true JP3924237B2 (en) | 2007-06-06 |
Family
ID=32455758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002310162A Expired - Fee Related JP3924237B2 (en) | 2002-10-24 | 2002-10-24 | Plastic injection molded product and its strength measurement method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3924237B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4869678B2 (en) * | 2005-10-28 | 2012-02-08 | オリンパス株式会社 | Compressed wood product manufacturing method |
-
2002
- 2002-10-24 JP JP2002310162A patent/JP3924237B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004142263A (en) | 2004-05-20 |
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